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Posted to dev@hive.apache.org by "Kevin Wilfong (JIRA)" <ji...@apache.org> on 2013/06/05 18:54:20 UTC

[jira] [Commented] (HIVE-4324) ORC Turn off dictionary encoding when number of distinct keys is greater than threshold

    [ https://issues.apache.org/jira/browse/HIVE-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13676104#comment-13676104 ] 

Kevin Wilfong commented on HIVE-4324:
-------------------------------------

Sorry for the delay Owen.  Are you concerned that there will be applications outside of Hive calling methods in OrcFile.java?

If so I can add the backward compatible method.
                
> ORC Turn off dictionary encoding when number of distinct keys is greater than threshold
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-4324
>                 URL: https://issues.apache.org/jira/browse/HIVE-4324
>             Project: Hive
>          Issue Type: Sub-task
>          Components: File Formats
>    Affects Versions: 0.11.0
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>         Attachments: HIVE-4324.1.patch.txt
>
>
> Add a configurable threshold so that if the number of distinct values in a string column is greater than that fraction of non-null values, dictionary encoding is turned off.

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